EP2943044A1 - Élément thermique d'appareil de cuisson et appareil de cuisson, en particulier table de cuisson - Google Patents

Élément thermique d'appareil de cuisson et appareil de cuisson, en particulier table de cuisson Download PDF

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Publication number
EP2943044A1
EP2943044A1 EP15164255.0A EP15164255A EP2943044A1 EP 2943044 A1 EP2943044 A1 EP 2943044A1 EP 15164255 A EP15164255 A EP 15164255A EP 2943044 A1 EP2943044 A1 EP 2943044A1
Authority
EP
European Patent Office
Prior art keywords
heating
radiator
heating conductor
unit area
heizleiterabschnitt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15164255.0A
Other languages
German (de)
English (en)
Other versions
EP2943044B1 (fr
Inventor
Andreas Hann
Leonhard Ott
Konrad Weinbrenner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2943044A1 publication Critical patent/EP2943044A1/fr
Application granted granted Critical
Publication of EP2943044B1 publication Critical patent/EP2943044B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0258—For cooking
    • H05B1/0261—For cooking of food
    • H05B1/0266—Cooktops
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/003—Heaters using a particular layout for the resistive material or resistive elements using serpentine layout
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/037—Heaters with zones of different power density
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the invention relates to a heating element for a cooking appliance, comprising a band-shaped heating conductor, which has an electrical connection at a first end and a second electrical connection at a second end. Furthermore, the invention relates to a cooking appliance, in particular a hob, with at least one such radiator.
  • a radiant heater has two heating coils, wherein a heating coil largely covers, with the exception of the outermost peripheral region, the cooking zone area and is designed in the form of semicircular heating areas with mutually concentric winding layers.
  • This heating coil is surrounded by a circular additional single-stranded heating coil, which is located directly on the periphery of the hob.
  • the two separate heating coils are each designed as separate heat conductors, their respective two ends being formed with electrical connection points.
  • the conceptual design to improve the cooking time or to improve the Ankochvorgangs is relatively expensive, and it will require several different separate heating conductors.
  • a heating element according to the invention for a cooking appliance comprises a strip-shaped heating conductor which has an electrical connection at a first end and a second electrical connection at a second end.
  • Such a configuration thus virtually provides a single heating conductor, which is designed as a strip or strand, which along its length comprises at least two different heating conductor sections which have different electrical heating powers per unit area of the same size.
  • an individual section design is thus integrated, so to speak, integrated in a single heating conductor, which has only two ends in its linear or single-track configuration, which makes it possible to provide different heating powers per unit area in the single heating conductor itself.
  • a radiator is created, which is formed on the one hand reduced component, on the other hand, a more flexible and variable possibility of different heating power provision allows.
  • an improvement of the Ankochvorgangs is also associated.
  • the unit area is preferably one square centimeter.
  • the first heating conductor section has a meander-shaped turn, which has ring-like winding sections.
  • These annular winding sections preferably have a circumferential length greater than 270 °, preferably greater than 300 °.
  • These ring-like winding sections thus also represent horseshoe-shaped winding sections.
  • winding sections preferably run concentrically around a radiator axis.
  • the second heating conductor section has a meandering turn.
  • the first heating conductor section is arranged radially further out than the second heating conductor section, in particular when the heating conductor sections are designed as ring-like windings.
  • the first heating power per unit area is higher than the second heating power per corresponding unit area.
  • a greater heating power per unit area is virtually provided at the outer regions than in the inner region. This is particularly advantageous for a very fast and targeted warming up. Since usually a bottom of a cookware usually has a concave shape and the bearing surface concentrates on the outer surface, such a design also results in better heat transfer from the radiator to the bottom of the cookware. This heat transfer by heat radiation and heat conduction is particularly favored by this advantageous embodiment of the invention in terms of improved heat transfer.
  • the heating conductor has a third heat conductor section, which has a first and second different third heating power per unit area.
  • the third heat conductor section has a meandering turn and, viewed in the radial direction, is arranged at least in regions between the first and the second heat conductor section.
  • the first Schuleiterabrough viewed in the radial direction of the windings of the heating element is at least partially arranged as the radially outermost Edelleiterabrough and the inside of the third Schuleiterabrough is arranged. Again, looking inward in the radial direction, the first heating conductor section is again arranged, and then, in turn, the second heating conductor section is arranged inwards. The winding arrangement of the heating conductor sections is thus arranged so that this interleaving results in the radial direction.
  • the third heating power is greater than the first and the second heating power.
  • the heating conductor sections are formed as separate bands, which are connected at connecting points to a single strand as a heating conductor, so that the strand is designed with a single track or single line.
  • they can first be produced as separate tapes, which in this regard a high Individuality is achieved. This applies in particular to form-specific individuality and material-specific individuality.
  • the heating conductor is formed as a one-piece, connectionless strand and in the context is virtually not composed of separate pieces, but is made as a part.
  • the heating conductor sections are different in their heights and / or widths and / or material compositions and thus the different heating powers are formed or defined.
  • a wide variety of shapes and specifications relating to height differences and / or width differences can be formed.
  • symmetrical or asymmetrical height changes can be formed relative to a longitudinal axis of the band-shaped heating conductor.
  • shaping of a heating conductor section from this longitudinal axis in the vertical direction, viewed upwards forms a different shape than viewed in a downward direction in the vertical direction relative to this longitudinal axis.
  • a wide variety of heating conductor sections can be configured in a variety of configurations, so that individual account can also be taken with regard to their respective lengths and / or space requirements.
  • the radiator has a temperature limiter unit, which is connected in particular in series with the heating conductor.
  • the temperature limiting unit has a sensing element and thus in particular a temperature sensing element and has a mechanically translated switching contact, which is connected in series with the heating conductor.
  • This temperature limiter unit is preferably arranged between the heating conductor and the hob plate already mentioned above. As soon as a given or set limit temperature value is reached as the threshold value, the heating power supply is switched off or at least reduced by this temperature limiter unit.
  • the invention relates to a cooking appliance, in particular a hob, with at least one radiator according to the invention or an advantageous embodiment thereof.
  • a cooking appliance 1 is shown, which is a hob in the embodiment.
  • the cooking appliance 1 comprises a hob plate 2, which may be formed of glass or glass ceramic.
  • On an upper side 3 of the hob plate 2 are in the embodiment in terms of number, position and shape only to be understood by way of example cooking zones 4, 5, 6 and 7 formed. These can be seen on the top 3, marked by appropriate marks these cooking zones 4 to 7.
  • the cooking appliance 1 further comprises at least one radiator 8, 9, 10 and 11 arranged below the hob plate 2. These radiators 8 to 11 are arranged positionally below the hob plate 2 in such a way that the surface areas of the identified cooking zones 4 to 7 are heated.
  • the radiators 8 to 11 are designed as radiant heaters and are operated by a control and / or regulating unit, not shown.
  • the cooking appliance 1 also includes an operating device 12, which is also to be understood as an example only with regard to their positional arrangement and design.
  • the operating device 12 comprises by way of example at least one operating element and a display unit, wherein the operating element can be a manually operated and relative to the hob plate 2 movable operating element or can be a touch-sensitive control element.
  • FIG. 2 an embodiment of a radiator is shown in a plan view, wherein the radiator 8 is shown here by way of example.
  • This radiator 8 comprises a cup-shaped base body 13, which circumferentially has an insulation ring 14.
  • This insulating ring 14 is arranged on a pot bottom 15.
  • the heating element 8 comprises a band-shaped heating conductor 16.
  • This band-shaped heating conductor is formed as a single strand or as a single band and comprises only two ends, a first end 16a and a second end 16b. In particular, these ends 16a and 16b also each have an electrical connection 17a and 17b.
  • This band-shaped heating conductor 16 is, as in Fig. 2 can be seen in the plan view, multiple wound, here meander-shaped turns are designed, which are arranged circumferentially around a center A of the radiator 8 ring-like. They are laid horseshoe-like. It is provided in the embodiment shown that this single heating element 16 has a first heating conductor section 18 and a second heating conductor section 19.
  • the first Thompsonleiterabites 18 opens with its first end, which is the end 16a of the entire heat conductor 16 in the embodiment, to the outside, and opens with a second end opposite this end 16a to the connection point 20.
  • the second Schuleiterabites 19 is formed in that it opens at a first end to the connection point 20 and to the outside with a second end, which in the exemplary embodiment represents the second end 16b of the entire heating conductor 16.
  • the first Schumacherabites 18 a plurality of these ring-like windings, viewed in the radial direction represent the more outer turns. In contrast, therefore, are also more numerous turns of the second Schuleiterabitess 19 viewed in the radial direction further inside.
  • the radiator 8 further comprises a temperature limiter unit 21, which has a temperature sensor or a sensor element 22 and a mechanically translated switching contact 23. This switching contact 23 is connected in series with the heating conductor 16.
  • the heating conductor sections 18 and 19 have different electrical heating powers per respective same unit area, wherein the first Heating power per unit area of the first Schuleiterabitess 18 is greater than the second heating power per unit area of the second Schuleiterabitess 19th
  • a further embodiment of a radiator 8 is shown in a simplified plan view.
  • the heating conductor 16 has a third heating conductor section 24 in addition to the first heating conductor section 18 and the second heating conductor section 19.
  • This third heating conductor section 24 has a third heating power per unit area, which is different from the first heating power per unit area and the second heating capacity per unit area. In particular, this third heating power per unit area is greater than the first heating power per unit area and the second heating capacity per unit area.
  • a connection point 20 is then formed between the first heat conductor section 18 and the second heat conductor section 19.
  • a further connection point 25 is formed between the second heat conductor section 19 and the third heat conductor section 24.
  • one of the only two ends 16a and 16b also represents the end of the third heat conductor section 24.
  • the first end 16a of only two ends of the entire heating conductor 16 is again formed by one end of the first heating conductor section 18.
  • the first heating conductor section 18 which thus also initially starts circumferentially around the center A with a radially outermost turn.
  • the first heating conductor section 18 Following inward in the radial direction then preferably includes a plurality of winding sections of the third heating conductor section 24.
  • a further turn section of the first heating conductor section 18 is then arranged, wherein in turn, following this, in the radial direction following inwards, a plurality of turn sections of the second heating conductor section 19 follow. These then also close off the entire turn sections towards the center A.
  • the entire single-stranded or single-band heating conductor 16 is composed of a plurality of sections arranged in series one behind the other composed, which form through the Schuleiterabête 18 and 19 and additionally 24. It is thus here a one-piece heating element 16 is formed, which have only two ends 16a and 16b in its overall design.
  • FIG. 4 is a further embodiment of a radiator 8 shown in a plan view.
  • the three Schuleiterabête 18, 19 and 24 are not provided as separate bands, which are connected via connecting points 20 and 25 to a one-piece strand, but this heating element 16 is manufactured and provided by default as a one-piece component.
  • the different heating power per unit area of Edelleiterabête 18 and 19 and in the embodiment according to Fig. 3 and Fig. 4 can be due to different heights (in the direction perpendicular to the plane of the figure in Fig. 2 to Fig. 4 ) and / or different widths and / or different material compositions.
  • FIG Fig. 4 With respect to the radial arrangement of the winding sections of the meandering turns of the heating conductor sections 18, 19 and 24 in FIG Fig. 4 is on the arrangement, as in Fig. 3 referred to. In principle, however, other radial arrangements of the winding sections of the individual heating conductor sections 18, 19 and 24 may be provided.
  • Fig. 5 is an example of an embodiment of a heat conductor 16 shown in a side view. It can be seen that the heating conductor section 24 forms a greater height, which is measured perpendicular to a longitudinal axis B of the heating conductor 16. The longitudinal axis B is measured between the ends 16a and 16b, and the height is measured perpendicular thereto, so that they are in the representations in Fig. 2 to Fig. 4 perpendicular to Figure axis measured.
  • the third Thompsonabêt 24 viewed from the longitudinal axis B upwards and thus the pot bottom 15 facing away from a trapezoidal elevation 24a.
  • a plurality of tongues 24b are formed, of which only a few are provided with the corresponding reference numerals for clarity.
  • the first heat conductor section 18 has a lower height than the third heat conductor section 24. He has no such trapezoidal elevation 24a in the embodiment. Only at its lower edge and thus to the pot bottom 15 in turn corresponding tabs or tongues 18a are formed.
  • the second heat conductor section 19 is formed in the embodiment with respect to its basic geometric shape design corresponding to the first heat conductor section 18. However, here the height of a median strip 19b is smaller compared to a median strip 18b. Otherwise, here also downwards and thus in the direction of the pot bottom 15 tabs or tongues 19a are formed.
  • Fig. 6 is another embodiment of a heat conductor 16 is formed, in which case symmetrical shapes are designed to the longitudinal axis B.
  • the third heat conductor section 24 has trapezoidal elevations 24a and 24c, which are designed to be equally large, both upwardly and downwardly.
  • the first heat conductor section 18 only the center strip 18b is present and the tabs 18a are not formed.
  • the height of this central strip 18b is smaller than the entire height of the trapezoidal elevations 24a and 24c.
  • only the center strip 19b is formed in the second heat conductor section 19 and no corresponding tongues 19a are present.
  • the height of this median strip 19b is smaller than the height of the median strip 18b. Due to the respective specific shapes of the heating conductor sections 18, 19 and 24, different electrical resistances are also formed, which then also result in the different heating powers per unit area.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Cookers (AREA)
EP15164255.0A 2014-05-06 2015-04-20 Élément thermique d'appareil de cuisson et appareil de cuisson, en particulier table de cuisson Active EP2943044B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014208408.3A DE102014208408A1 (de) 2014-05-06 2014-05-06 Heizkörper für ein Gargerät sowie Gargerät, insbesondere Kochfeld

Publications (2)

Publication Number Publication Date
EP2943044A1 true EP2943044A1 (fr) 2015-11-11
EP2943044B1 EP2943044B1 (fr) 2017-08-09

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ID=53008295

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Application Number Title Priority Date Filing Date
EP15164255.0A Active EP2943044B1 (fr) 2014-05-06 2015-04-20 Élément thermique d'appareil de cuisson et appareil de cuisson, en particulier table de cuisson

Country Status (3)

Country Link
EP (1) EP2943044B1 (fr)
DE (1) DE102014208408A1 (fr)
ES (1) ES2644074T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3068117A1 (fr) * 2017-06-27 2018-12-28 Frima International Ag Systeme modulaire comprenant au moins deux types d'appareils de cuisson et appareil de cuisson
CN109392203A (zh) * 2018-08-01 2019-02-26 安吉热威电热科技有限公司 一种电阻丝结构及带有该电阻丝的电辐射加热器
CN112930137A (zh) * 2018-09-25 2021-06-08 布瑞威利私人有限公司 烹饪器具

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3206024A1 (de) 1982-02-19 1983-09-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Elektrokochplatte, vorzugsweise glaskeramik-kochmulde
WO2000065875A1 (fr) * 1999-04-23 2000-11-02 I.R.C.A. S.P.A. - Industria Resistenze Corazzate E Affini Procede de fabrication d'elements chauffants pour plaques vitro-ceramiques; element chauffant ainsi obtenu
DE69803586T2 (de) * 1997-02-17 2002-08-08 Strix Ltd Heizungswiderstände
DE10310255A1 (de) * 2003-03-05 2004-09-16 E.G.O. Elektro-Gerätebau GmbH Elektrische Heizung mit einer Kontaktkochplatte
DE102004024044A1 (de) * 2004-05-07 2005-11-24 E.G.O. Elektro-Gerätebau GmbH Elektrischer Heizleiter aus Keramik und Verfahren zu seiner Herstellung sowie Heizeinrichtung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI281833B (en) * 2004-10-28 2007-05-21 Kyocera Corp Heater, wafer heating apparatus and method for manufacturing heater

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3206024A1 (de) 1982-02-19 1983-09-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Elektrokochplatte, vorzugsweise glaskeramik-kochmulde
DE69803586T2 (de) * 1997-02-17 2002-08-08 Strix Ltd Heizungswiderstände
WO2000065875A1 (fr) * 1999-04-23 2000-11-02 I.R.C.A. S.P.A. - Industria Resistenze Corazzate E Affini Procede de fabrication d'elements chauffants pour plaques vitro-ceramiques; element chauffant ainsi obtenu
DE10310255A1 (de) * 2003-03-05 2004-09-16 E.G.O. Elektro-Gerätebau GmbH Elektrische Heizung mit einer Kontaktkochplatte
DE102004024044A1 (de) * 2004-05-07 2005-11-24 E.G.O. Elektro-Gerätebau GmbH Elektrischer Heizleiter aus Keramik und Verfahren zu seiner Herstellung sowie Heizeinrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3068117A1 (fr) * 2017-06-27 2018-12-28 Frima International Ag Systeme modulaire comprenant au moins deux types d'appareils de cuisson et appareil de cuisson
CN109392203A (zh) * 2018-08-01 2019-02-26 安吉热威电热科技有限公司 一种电阻丝结构及带有该电阻丝的电辐射加热器
CN112930137A (zh) * 2018-09-25 2021-06-08 布瑞威利私人有限公司 烹饪器具

Also Published As

Publication number Publication date
DE102014208408A1 (de) 2015-11-12
ES2644074T3 (es) 2017-11-27
EP2943044B1 (fr) 2017-08-09

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